I need help identifying capacity and brand of these cells. I got them from Lenovo battery packs but I didn't see anything that showed capcity.
The red ones are embossed with Sanyo UR18650FM M51A , and have a light blue insulator ring on top.
The other is green with "SE US18650GR T 8A123B23v"
and my other 18650 next to my recovered ones
They are Sony cells.
2200mAh capacity.
http://www.centrix-intl.com/details.asp?productid=6052
They will very likely be well down on that capacity, laptops are outright cruel to their batteries.
The numbers from my light tests are always to be found here.
https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...
Thanks after looking at your link it looks like the 2 characters on the bottom line determines the version or something. Sony 18650 8A brings me to links of 2600mah versions like http://evva.en.ecplaza.net/catalog.asp?DirectoryID=202839&CatalogID=1249436 . I still can't find anything on the Sanyos .
The Sanyos - also very good cells but they will likely have had an extremely hard life
http://ancoo18650.en.made-in-china.com/product/wqImWhxEYlVH/China-UR1865...
The M51A bit, I've no idea about.
The numbers from my light tests are always to be found here.
https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...
"Sanyo UR18650FM M51A"
This cell has a green card insulator around the top button isn't it?
UR18650FM is Sanyo's main production 18650, it's 2600mah. Here's a mini datasheet - http://shop.battex.cz/pdf/1S1P-UR18650FM-K.pdf
All I can think is that the "M51A" part is a batch number or something like that.
I assume these are the cells that are in the new XTAR's
Don: Could you please explain why laptops are cruel to batteries and why the had an extremely hard life?
Pook: The Sanyo's have a light blue top.
I was going to use these in Battery packs with many in parallel in my HID and bike lights, do you think they would hold up?
and thanks for the help
Laptops run hot. Their batteries get hot. Very hot. This is a Bad Thing.
They pull serious current out of the cells - I have an old Vaio laptop that wants 120W from the cells - which is cruel.
They get stored fully charged and hot - and their chargers tend to over charge the cells.
Heat is bad for cells, heavy current draw is bad for cells. They get stored with fully charged cells that rarely get a chance to spill some charge - how often do most users run them on battery?
Not how cells ought to get treated. My 3 year old work (And everything else) laptop can barely boot before the battery gives out. My 5 year old Vaio can't get through a boot before the cells die.
The numbers from my light tests are always to be found here.
https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...
Wow! That's a lot of li-ion batteries.
Don wrote:
"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion
Yes , I love my li-ion cells , now all I need is to find a decent hobby charger to tend to them as the trustfire tr-001 aren't cutting it.
Indeed...It looks like you have competition:P
He's waaaaaay ahead of me when it comes to li-ion batteries.
Don wrote:
"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion
I think you'll need several chargers.
Don wrote:
"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion
Definitely Sony 2200mAh. Pretty popular in mainstream HP laptops. Thats where my identical ones came from.
Be sure to grind off the tabs leftovers or you might damage flashlights if the intended use is that.
My samples have still around 2000mAh capacity but are really inadequate to power a good driven XM-L.
Beware to not overdischarge them.
They're gonna send you a green redcat with a black LED.
Take this one
http://www.xtarlight.com/en/05-chanpin/p-001-1.asp?styleid=69
IS there something wrong with the TR-001 model? I have had mine for a couple of months and am pretty happy with it. I know there is probably better out there, but is it still decent?
Not that there is anything wrong with it , a tad slow but its more like that I dont have enough chargers
Zebralight Spark Princeton Inova Petzl Maglite Bushnell a lot of Cree XM-L Lights 18650's Intl-outdoor 3400 Panasonic 3100 Hobby Charger
Zebralight Spark Princeton Inova Petzl Maglite Bushnell a lot of Cree XM-L Lights 18650's Intl-outdoor 3400 Panasonic 3100 Hobby Charger
I've found that a good test for laptop cells is to test the voltage during salvage. Anything under 2.8 gets gone. Those that make the cut get charged to 4.20 and then set aside for 2 weeks. If they don't hold a charge when measured at 2 weeks out, they go in the junk bucket with those below 2.8. Generally, I find that if they hold 4.2-4.1 for two weeks they will likely be usable in single cell lights. I'll occasionally put a few on the hobby charger and see what the capacity is, but I have found that generally the ability to hold a charge is a pretty good predictor of which cells will also still hold most of their rated capacity.
I've salvaged a bunch of 18650's from dead laptop packs. In every single case an AW or TF flame out performs them hands down. Salvaged cells are good in a pinch, but do yourself a favor and invest in some good protected cells.
The Sonys are 2600mAh
on Sony lithium ion cells look at the first two digits in the second row.
8A = 2600mAh
G7= 2400mAh
G6, 6A, 6B= 2200mAh
G5= 2150mAh
G4= 1950mAh
The last 5 digits of that row tell the manufacturing date.
digit 1: year. Q=2008, R=2009, S=2010 and so on
digit 2: month. A=Jan, B=Feb, ...J= Oct
digit 3+4: day
digit 5: electrode history
so the cell on the photo was produced on Oct 29, 2008 (QJ29)
on the Sanyo, M51A is the manufacturing date-code
M= 2008 (N=2009....)
51= week number 51 of the year
A is some internal reference
Welcome to BLF arztt!
Very informative first post. Thanks for jumping in!
=the=
Welcome arztt. Good to have you here.
Thanks for the information
The numbers from my light tests are always to be found here.
https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...
Great info, arztt.
Welcome to BLF. I have fun here and I think you will too.
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Can someone tell more codes for determine production year for Sanyo and Sony cells?
Are the laptop batteries protected?
The batteries are - extensively. But the individual cells in the battery are not.
OK pedant mode off.
They aren't.
The numbers from my light tests are always to be found here.
https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...
Its very simple, because its alphabetical.
Just keep in mind that production year 2008 is Q for Sony and M for Sanyo, then look on your cell and count backwards or forward to your letter while each letter is a year.
Aloha and welcome to BLF arztt!
Don wrote:
"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion
Production year 2003 and still 1,16Ah
at 1,6A current. Unfortunately just one of six. One 0,76Ah, other four 0,08Ah
Good to have you here, arztt.
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